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Jackson Release 3.2

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Tatu Saloranta edited this page Mar 10, 2026 · 162 revisions

Jackson Version 3.2 is under development as of February, 2026.

This wiki page gives a list of links to all changes (with brief descriptions) that will be included.

Status

Version is under development (under branch 3.x).

It will likely NOT be designated as Long-Term-Support (LTS) since 3.1 is an LTS.

Patches

No release yet.

Documentation

Articles, Blog posts

Changes, compatibility

Android

Up to SDK 34 for all components (Jackson 3.1 had SDK 26 for jackson-core, 34 for jackson-databind). Verified by "Animal Sniffer" plug-in.

JDK

Same as Jackson 3.1; Java 17.

Kotlin

Same as Jackson 3.1?

Compatibility: datatype modules

No changes.

Changes, behavior

Databind, default changes

  • #5734 -- "DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES treats absent field same as explicit null" -- changed handling so missing primitive values no longer fail unless DeserializationFeature.FAIL_ON_MISSING_CREATOR_PROPERTIES is enabled

Major focus area(s)

Most wanted Issues resolved

Issues with at least 5 thumbs-ups that were resolved in this version:

None yet.

Full Change list

Changes, core

Annotations

N/A

Streaming

  • #679: Number parsing should fail for trailing dot (period)
  • #1544: Validate read() parameters in MergedStream and UTF32Reader
  • #1545: Increase Android baseline from 26 to 34 in Jackson 3.2
  • #1564: Add SimpleStreamReadContext.rollbackValueRead() method
  • #1570: Fail parsing from DataInput if StreamReadConstraints.getMaxDocumentLength() set

Databind

  • #1075: @JsonUnwrapped fields with matching @JsonIgnored getter in outer class are ignored
  • #1515: @JsonSerialize(Typing.DYNAMIC) in some cases does not override MapperFeature.USE_STATIC_TYPING
  • #1622: Failure to deserialize child object when using @JsonIgnoreProperties to break cycle
  • #1755: Get NPE on deserializing values with recursive @JsonIgnoreProperties
  • #3194: Deserialization of 2-dimensional arrays of final types fails when using DefaultTyping.NON_FINAL
  • #3216: Delegating @JsonCreator does not prevent unnecessary introspection of properties, leading to bogus failure
  • #3355: Deserialization fails depending on the order of deserialized objects with "Cannot construct instance (although at least one Creator exists)"
  • #3591: Ignored fields not consistently exposed via BeanDescription.getIgnoredPropertyNames()
  • #5615: JsonMapper seems to be not thread-safe when using the polymorphic JsonTypeInfo.As.PROPERTY definition (and @JsonIgnoreProperties)
  • #5727: VisibilityChecker overrides equals() without overriding hashCode()
  • #5734: DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES treats absent field same as explicit null

Changes, data formats

Avro

  • #611: Remove IOException from AvroMapper.schemaFrom() method signatures

Smile

  • #674: Smile parser does not update StreamReadContext index or entry count

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